ISSN:
0009-2940
Keywords:
Titanacyclobutane complexes
;
Vinylidene intermediates
;
Titanium complexes
;
MO theory, applied
;
Cycloreversion
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Structure and Reactivity of Bis(π-pentamethylcyclopentadienyl)(2-methylidene)titanacyclobutaneThe reaction of vinyllithium with bis(π-pentamethylcyclopentadienyl)titanium dichloride in a molar ratio of 2:1 quantitatively yields the unexpected titanacyclobutane derivative (2) (Cp* = [C5(CH3)5]). The isolated complex 2 has been characterized by spectroscopic methods and by elemental analysis, and its structure has been confirmed by an X-ray structure determination. The chemical reactivity of 2 is characterized by the splitting of the four-membered ring at higher temperatures, forming a titanocene vinylidene fragment {Cp2*Ti = C = CH2} and ethylene. This cycloreversion is confirmed by the fragmentation behavior in the mass spectrometer, and some aspects of it have been studied by Extended Hückel Model calculations.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19921250204
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